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Physical & Chemical properties

Particle size distribution (Granulometry)

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Reference
Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-11-29 - 2018-11-30
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)
Deviations:
no
Qualifier:
according to guideline
Guideline:
ISO 13320 (Particle size analysis - Laser diffraction methods)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7520 (Particle Size, Fiber Length, and Diameter Distribution)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
Laser scattering/diffraction
Type of particle tested:
primary particle
Type of distribution:
volumetric distribution
Key result
Percentile:
D50
Mean:
12.5 µm
St. dev.:
0.13
Remarks on result:
other: average of two test series
Percentile:
D10
Mean:
4.7 µm
St. dev.:
0.02
Remarks on result:
other: average of two test series
Percentile:
D90
Mean:
27.7 µm
St. dev.:
0.23
Remarks on result:
other: average of two test series
Conclusions:
median particle size D50 = 12.5 µm
Executive summary:
The particle size distribution of the test item 2-Hydroxy-1-[4-(4-(2-hydroxy-2-methylpropionyl)phenoxy)phenyl]-2-methylpropan-1-one was determined by laser light scattering, according to OECD Guideline 110 (and OPPTS 830.7520 and ISO 13320). The test material has a median particle size D50 = 12.5 µm.

Description of key information

median particle size D50 (determined using OECD 110; GLP): 12.5 µm (arithmetic mean of two determinations)

Additional information

The particle size distribution of the test item was determined by laser diffraction, according to OECD Guideline 110 (and ISO 13320, 2009).

A reliability score of 1 was assigned, in accordance with the criteria for assigning data quality in line with the principles described by Klimisch (1997).

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